Proximity AlarmCircuit Project
#proximity sensor
#alarm circuit
#security
#buzzer
#detection
#safety
#warning system
#electronic alarm
#sensor circuit
No description available.
Auto lights-on reminder
The alarm consists of a diode, buzzer, and a limiting resistor. The diode functions as a switch that enables the buzzer to activate only when the light switch is closed and the ignition is turned off.
The circuit described utilizes a...
Proximity-sensor
The SillOO series circuit input is connected to a capacitive field sensor, potentially utilizing a double-sided circuit board. Any induced voltage change on the plate is directed to the input of the peak detector section of the operational amplifier circuit....
Elderly lost alarm circuit
The circuit utilizes an RMIB multivibrator component that operates at a maximum distance. When the distance exceeds a specific threshold, the output pin of the receiver goes low, effectively stopping the oscillation. The NE555 multivibrator, which is part of the...
Novel Buzzer
This novel buzzer circuit uses a relay in series with a small audio transformer and speaker. When the switch is pressed, the relay will operate via the transformer primary and closed relay contact. As soon as the relay operates the...
Single Zone AlarmCircuit - Project
The circuit includes automatic entry and exit delays, a timed bell cut-off, and a system reset feature. It accommodates both normally open and normally closed switches, making it compatible with common input devices such as pressure mats, magnetic reed contacts,...
buzzer only beep once
A bite alarm, commonly used in fishing, typically emits a beeping sound when the fishing line passes over a wheel equipped with notches that facilitate optical switching, resulting in a beep-beep-beep sound until the wheel stops. However, the specific alarms...
Electronic Locker Guard
Protect your locker or briefcase from theft using this pocket-sized gadget. It emits a loud police siren to attract attention. The circuit utilizes a single integrated circuit (IC).
This circuit is designed to provide a compact and effective security solution for...
ETest buzzer and SCR
After soldering the components indicated in the circuit diagram, a quick verification is necessary. A voltage of 3 volts was supplied using a pair of AA batteries for this purpose.
The verification process involves ensuring that all components are correctly soldered...
Vary the Volume of a Buzzer
This project involves creating a simple buzzer circuit that allows for volume control of the sound output. The volume can be adjusted using a potentiometer. When the potentiometer is set to a low resistance (near 0Ω), the buzzer produces its...